Median annual earnings of wage-and-salary respiratory therapy technicians were $39,120 in May 2006. The middle 50 percent earned between $32,050 and $46,930. The lowest 10 percent earned less than $25,940, and the highest 10 percent earned more than $56,220.
Source: Bureau of Labor Statistics, U.S. Department of Labor, Occupational Outlook Handbook, 2008-09 Edition